JP2553404B2 - Blood sampling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a blood collection device.

[Prior Art] Conventionally, a blood collecting apparatus as described in Japanese Patent Laid-Open No. 1-288236 has been proposed. A conventional blood collection device stores a blood bag in a blood collection chamber, detects that the weight of the blood bag, which increases with blood collection, reaches a predetermined level with a weight sensor, and stops the blood collection operation based on the detection result. As a result, a predetermined amount of blood is collected in the blood bag.

In this conventional blood collecting device, by shaking the pan of the blood bag during blood collection into the blood bag, thereby stirring the anticoagulant such as heparin and the blood preloaded in the blood bag and the blood. , Prevent blood clotting.

[Problems to be Solved by the Invention] However, in the conventional blood collection device, when soft plastic blood to which a plastic blood collection tube is connected is used as a blood bag, it is set in a saucer and used for blood collection. The blood bag is bent as shown in FIG. 13, and the blood flowing from the blood collection tube into the bag does not reach the entire area of the bag at least from the initial stage of blood collection. Therefore, the blood that has flowed into the space inside the bag up to the bent portion at the initial stage of blood collection is not sufficiently agitated with all the anticoagulant in the bag, and blood coagulation easily occurs.
In this way, when blood coagulation occurs in the initial stage of blood collection,
In the middle to end stages of blood collection, there is a disadvantage that the coagulation state that originally occurred is not resolved, and further new blood coagulation occurs around the initially coagulated blood.

The present invention prevents bending of a blood container set in a container support part and used for blood collection, sufficiently mixes blood introduced into a blood container with an anticoagulant in the container, and prevents occurrence of blood coagulation. The purpose is to

[Means for Solving the Problems] The present invention according to claim 1 provides a container support portion supporting a blood container containing a soft plastic anticoagulant, to which a plastic blood collection tube is connected, and during blood collection into the blood container. In a blood collecting device having a rocking means when the container supporting part is rocked and a blood collecting amount measuring means for measuring the blood collecting amount into the blood container, the blood collecting device is formed on the blood container on the side opposite to the blood collecting tube connecting part. A container locking device for locking the blood container at a predetermined position in the container supporting part by locking it to the locked part, and the container locking device at the container supporting part. In order to hold the blood container supported by the above from above, and to prevent the blood container from bending, a container holder rotatably provided on the container support portion is provided.

[Operation] In the present invention, a situation in which the blood container supported by the container support portion is bent and the following results are obtained.

When using a soft plastic blood container to which a plastic blood collection tube is connected as the blood container,
The blood collection tube connection part of the blood container set in the container support part is easily bent at the boundary with the container body. This is because the container main body is thin and soft, while the blood sampling tube connecting portion is relatively hard due to the thick tube inside, so that bending easily occurs at the boundary between the hard and soft portions.

And, it was found that the above-mentioned bending occurs frequently under the following blood collecting conditions.

When the blood container is set on the container support part, the container is not set at a proper predetermined position on the container support part, but is set to one side of the container support part, or is set to be tilted obliquely. The blood collection tube connection part comes into contact with the frame-shaped side edge part of the container support part and is lifted up, and the blood collection tube connection part bends at the boundary with the container body part.

When the container support part is swung during blood collection and has a downward slope, the blood container slides down and is biased toward one end of the container support part or inclined obliquely and bent in the same manner as described above.

Even if the blood container is set at an appropriate predetermined position on the container support part, the blood collection tube is extended upward from the connection part with the blood container toward the blood collector side, and is pulled up by the blood collection tube extended upward. The blood collection tube connecting portion that tends to bend at the boundary with the container body.

Note that this tendency is that the swing fulcrum of the container support portion is set at the intermediate portion of the container support portion, and the amplitude of the swing around the blood collection tube connection portion located on one end side of the container support portion is made large to obtain the blood collection tube. When the blood introduced into the container from the container is shaken greatly at the same time as it is introduced, in order to ensure the agitation of the blood and the anticoagulant from the beginning of the blood introduction,
The blood sampling tube connecting portion that largely shakes during blood sampling becomes more attracted to the blood sampling tube extending upward, and the above-mentioned bending becomes more remarkable.

Even when the blood container is set at an appropriate predetermined position of the container support part, in a state in which the blood collection tube extended upward from the blood container toward the blood collector side is twisted around its own axis in the extending process, When the tube is clamped by the tube holder, the repulsive force of the twist generated in the tube raises around the blood collection tube connection part of the blood container, and the blood collection tube connection part bends at the boundary with the container body part.

The blood container has another one for separating the components of the collected blood.
If the child containers are connected by a connecting tube, and the child containers are set on the lower surface side of the blood container in the container support part, the tube connecting parts of the plurality of containers are overlapped with each other. The blood collection tube connection part of the blood container located on the upper side is bulged due to the presence of the tube connection part of the child container located on the lower side to form a large step above the container body part of the blood container. The blood collection tube connection part bends at the boundary with the container body.

Therefore, in the present invention, the following (a) and (b) can prevent the occurrence of bending of the blood container due to the above-mentioned (1) to (3), and thus the occurrence of blood coagulation.

(A) In the blood container set in the container support part, a locked part (suspension slit or the like) formed in the blood container on the side opposite to the blood collection tube connection part is locked in the container support part. It is locked to the tool and held in a proper predetermined position in the container support.

Therefore, when setting the blood container on the container support part, the container is set at an appropriate predetermined position without being set to one side or tilted obliquely, and the blood container around the blood collection tube connection part is supported on the container support part. The blood collection tube connecting portion does not bend at the boundary with the container main body because it does not abut against the frame-shaped side edge of the portion and is lifted (above-mentioned elimination).

Further, even when the container support portion is swung during blood collection and has a downward slope, the blood container does not slide down and lean toward one end of the container support portion, and does not tilt obliquely, and thus does not bend ( Resolution of the above).

As a result, the blood flowing from the blood collection tube into the blood container is thoroughly mixed with the entire anticoagulant in the container from the initial stage of blood collection, and as a result, the occurrence of blood coagulation can be reliably prevented. .

(B) The blood container set in the container support part is held from above by a container holder rotatably provided on the container support part around the blood collection tube connection part, and bending of the blood container is prevented. It

Therefore, when the blood collection tube is extended upward from the connection portion with the blood container toward the blood collector, the blood collection tube extended upward tends to pull up the blood collection tube connection portion of the blood container. Is prevented by the presence of the above, and as a result, the blood collection tube connecting portion does not bend at the boundary with the container body (the above-mentioned elimination). This action of the container holder sets the swing fulcrum of the container support part at the middle part of the container support part, and increases the amplitude of vibration around the blood sampling tube connection part located at one end side of the container support part. As the blood introduced into the container from the blood collection tube is shaken greatly at the same time,
Even when trying to ensure that the blood and anticoagulant are agitated from the beginning of blood introduction, the blood collection tube connection, which fluctuates significantly during blood collection, tends to greatly attract the blood collection tube that extends upward. The bending is surely prevented.

Also, when the blood collection tube that extends upward from the blood container toward the blood collector is twisted around its own axis in the extension process and is clamped by the tube holder, the repulsion of the twist generated in this tube The presence of the container holder suppresses the tendency of force to lift around the blood collection tube connection part of the blood container, and as a result, the blood collection tube connection part does not bend at the boundary with the container body (above-mentioned solution) ).

In addition, the blood container is provided with one or more other sub-containers connected by a connecting tube for separating the components of the collected blood, and the sub-container is superposed on the lower surface side of the blood container to form a container support portion. When set, as a result of the tube connection parts of a plurality of containers overlapping each other, the blood collection tube connection part of the blood container located on the upper side is raised due to the presence of the tube connection part of the child container located on the lower side. Even if a large step is formed upward with respect to the container main body, the presence of the container holder keeps the blood collecting tube connecting part of the blood container substantially horizontal, and as a result, the blood collecting tube connecting part is Bending does not occur at the boundary with the bag body (above-mentioned elimination).

[Embodiment] FIG. 1 is a front view showing a blood collecting device according to an embodiment of the present invention, FIG. 2 is a side view showing a main portion of FIG.
Fig. 1 is a plan view of Fig. 1, Fig. 4 is a side view showing a scale, Fig. 5 is a vacuum circuit diagram, Fig. 6 is a swinging state diagram, Fig. 7 is a control block diagram, and Fig. 8 is blood sampling. FIG. 9 is a perspective view showing the apparatus, FIGS. 9 (A) and 9 (B) are schematic views showing a set state of the blood bag, FIG. 10 is a sectional view taken along line XX of FIG. 3, and FIG. 11 is a blood bag. FIG. 12 is a cross-sectional view showing a modified example of the container locking device.

As shown in FIGS. 1 to 3, the blood collecting device 10 includes a display panel 12 on the front surface of a housing 11, and a vacuum blood collecting chamber 13 is formed inside the housing 11. Reference numeral 14 is an opening / closing lid of the blood collection chamber 13, 15 is a hinge of the lid 14, and 16 is a sealing rubber for sealing the blood collection chamber 13. 14A is a handle of the lid 14. Further, the blood collection device 10 has a vacuum pump 17 and a control device 18 built in the lower portion of the housing 11.

The vacuum blood collection chamber 13 of the blood collection device 10 has an intake port for the vacuum pump 17.
A bag tray 19 is provided which communicates with 17A and can be depressurized and which supports a blood bag (blood container) 1 made of soft plastic such as polyvinyl chloride. The blood collection device 10 holds the bag tray under the reduced pressure in the vacuum blood collection chamber 13.
A predetermined negative pressure is applied to the blood bag 1 supported by 19 to collect blood. At this time, the blood collecting device 10 shakes the bag pan 19 to stir the anticoagulant such as heparin and the like preloaded in the blood bag 1 and the blood, and measures the weight of the blood bag 1 to collect the blood. Measure the quantity.

As shown in FIG. 11, the blood bag 1 has a tube connecting portion 1B formed at one end of a bag body portion 1A. The tube connecting portion 1B has a blood collecting tube 2 and a connecting tube with another child container. 3 is connected, and the outlets 4, 5 are also connected.
It has. Each of the inner diameters of the connecting tube 3 and the discharge ports 4 and 5 is provided with a closing member that can be opened. As a result, in the blood bag 1, the bag body 1A is thin and soft, whereas the tube connecting portion 1B is relatively hard because the thick tubes 2 and 3 are embedded therein. Bending is likely to occur at the hard-soft boundary.

As shown in FIG. 11, the blood bag 1 has a suspending slit 6 at the outer edge of the other end of the bag body 1A.

Here, the blood collection device 10 is fixedly provided with a hook-shaped container locking member 101 at the center of the inner surface of the upper rising wall of the bag tray 19 in FIG. 2 (FIGS. 3, 8, and 9).
(See Figure, Figure 10). As a result, in the blood collection device 10, the slit 6 formed in the blood bag 1 on the side opposite to the tube connection portion 1B is engaged with the container locking device 101, and the blood bag 1 is stored in the bag tray 19 inside. It can be held at an appropriate predetermined position.

Further, the blood collecting device 10 includes a gate-shaped container holder 102 which is rotatably supported by the left and right rising walls near the upper rising wall in FIG. (See FIG. 2, FIG. 3, FIG. 8 and FIG. 9). As a result, in the blood collection device 10, the tube connection portion of the blood bag 1 set in the bag tray 19
1B around the center holding part 1 by the own weight of the container holder 102
02A holds the blood bag from above and prevents the blood bag 1 from being bent.

The base end portion 102B of the container holder 102 supported by the bag tray 19 projects to the outer surface of the rising walls on both the left and right sides of the bag tray 19 to fix the arm 103, and the spring 104 is provided between the bag tray 19 and the arm 103. (See FIG. 2). That is, the container holder 102 has the habit of rotating to the bottom side of the bag tray 19 by its own weight, and at the same time, the container holder 102 is closed by the spring 104.
The pulling power to the side is given. As a result, before trying to set the blood bag 1 in the bag tray 19,
The container holder 102 is lifted and rotated by an operator against its own weight, and the rotation of the spring 104 is passed through a critical position where the clockwise rotating force of the spring 104 is larger than the counterclockwise rotating force of its own weight. It is pressed against the inner surface of the lid 14 in the opened state by force and is held at the standby position (see FIG. 9 (A)). Then, under the above-mentioned condition, the blood bag 1 is set on the bag tray 19, and the slit 6 of the blood bag 1 is engaged with the container locking member 101.
The operator pulls down and rotates from the standby position against the spring force of the blood vessel, passes through the above-mentioned critical position, and the center holding part 102A of the container holding part 102 moves around the tube connecting part 1B of the blood bag 1 by its own weight. Hold the work clamp from above.

In the above description, the holding force of the container holder 102 that holds the periphery of the tube connection portion 1 of the blood bag 1 by its own weight can prevent the tube connection portion 1B from bending with respect to the bag body portion 1A. It does not exceed the level, and is 30 g to 150 g, more preferably 40 g to 70 g.

It is preferable that the container holder 102 is supported by the bag tray because it can reduce the fluctuation of the holding state of the blood bag at the time of rocking, but if the fluctuation of the holding state of the blood bag is small, the lid 14 or Container holder on the inner wall of the vacuum blood collection chamber 13
It is also possible to support 102.

The structure of the blood collecting device 10 for swinging the bag tray 19 and the structure for measuring the weight of the blood bag 1 are as follows.

First, a gantry 20 is installed at the bottom of the vacuum blood collection chamber 13, and a oscillating frame 22 that is rotatable via a support shaft 21 is supported on the gantry 20. In addition, the rocking motor 23
Is a fixed shaft and is driven by the swing motor 23.
24 are supported. A crank wheel 28 is attached to one end of the driving shaft 24.
Is fixed, and the link is on the turning radius of this crank wheel 28.
One end of the link 29 is connected, and the other end of the link 29 is connected to the swing frame 22.

On the other hand, a scale mounting member 31 is fixed to the upper surface of the swing frame 22, and a scale (weight measuring means) 33 is supported on the scale mounting member 31 in a cantilever manner. The scale 33 is composed of a substantially rectangular (parallelogram) frame as shown in FIG. The scale 33 is attached to each of two positions on the upper surface and two positions on the lower surface to form a Wheatstone bridge circuit.
The above-mentioned bag tray 19 is fixed to the tip of the balance 33 via a weighing platform 35 and a receiving plate 36. The scale 33 has a weight sensor amplification unit 38.

That is, the blood collection device 10 rotates the driving shaft 24 and the crank wheel 28 by the operation of the swing motor 23, thereby swinging the swing frame 22 and supported by the swing frame 22 via the scale 33. The bag tray 19 will be swung. At this time, as shown in FIGS. 2 and 6, the bag tray 19 has two upper and lower points, namely, a maximum ascending point which makes + α degrees with respect to the horizontal and a descending maximum point which makes −β degrees. It can be swung as a turning point. Further, the one cycle time of the rocking that the rocking motor 23 imparts to the bag tray 19 is about 1.0 to 2.6 in the power frequency 60 Hz region.
Seconds, power source frequency is about 1.2 to 3 seconds in the area of 50 Hz. If the one cycle time is too long, the mixing of the anticoagulant in the blood bag 1 with the blood becomes weak. On the contrary, if it is too short, the blood in the blood bag 1 will not react to the movement of the bag tray 19. It exhibits a phenomenon that the tracking is poor and it becomes difficult to mix. Further, the blood collection device 10 supports the bag tray 19 on a scale 33 that is cantilevered on the swing frame 22 via a scale attachment member 31, and outputs the strain gauge 34 based on the flexural deformation of the scale 33. The weight of the blood bag 1 is measured by the change, and the blood collection amount is measured.

The blood sampling device 10 detects the rotational position of the detection cam 39 provided at the other end of the drive shaft 24 by the optical sensor 40, and controls the control device.
18 recognizes the current swing angular position of the bag tray 19 by the swing motor 23, and the bag tray 19 is at the turning point of either the highest point or the lowest point described above. The measurement result of the scale 33 is taken and the weight of the blood bag 1 is measured.

At this time, in the control device 18 of the blood sampling device 10, the bag tray is used at the initial or intermediate stage of blood sampling in the blood bag 1.
19 is at the turning point, and when taking the measurement result of the scale 33,
The swinging motion of the bag tray 19 by the swinging motor 23 is not completely stopped or is temporarily stopped for about 0.2 seconds. Also,
When the bag tray 19 is at the turning point and the measurement result of the scale 33 is taken in at the end stage of blood collection when the remaining amount of blood collected in the blood bag 1 is, for example, 50 ml or less, the bag tray by the swing motor 23 is used.
The swinging motion of 19 is temporarily stopped for about 0.5 seconds so that the weight of the blood bag 1 can be accurately measured at the end stage of blood collection.

Further, in the blood collecting device 10, the blood bag 1 is reliably rocked so as to prevent blood coagulation, and the rocking space of the bag tray 19 is made as small as possible.
In order to realize the compactness of the bag tray 19, the appropriate swing angle range “[+ α degree] to [−−
β degree] ”is determined as follows. That is, [+ α degree] that determines the above-mentioned maximum rising point of the bag tray 19 is [+10 degrees to +40 degrees].
Degrees], more preferably [+10 degrees to +30 degrees], and most preferably within an angle range of [+15 degrees to +25 degrees],
In this example, it is set to [+20 degrees]. Also, bag saucer
The [-β degree] that determines the above-mentioned lowest descent point of 19 is [-10 degrees ~
-40 degrees], more preferably [-10 degrees to -30 degrees], most preferably [-15 degrees to -25 degrees], and in this example, [-20 degrees]. Degree].

As shown in FIG. 5, the blood collection device 10 connects the intake port 17A of the vacuum pump 17 and the vacuum blood collection chamber 13 with a vacuum pipe 41, and is closed in the middle of the vacuum pipe 41 by turning on an exhaust solenoid 42. An exhaust valve 43 that is opened by gravity when the exhaust solenoid 42 is turned off is provided. The blood collection device 10 forms a constant negative pressure (vacuum degree) in the vacuum blood collection chamber 13 by controlling ON / OFF of the vacuum pump 17, and opens the exhaust valve 43 at the end of blood collection to open the vacuum blood collection chamber 13 to the atmosphere.

The blood collection device 10 is provided with a tube holder 44 at a portion adjacent to the vacuum blood collection chamber 13 on the upper part of the front side of the housing 11, and holds and draws the blood collection tube 2 connected to the blood bag 1 housed in the vacuum blood collection chamber 13. It is possible. The tube holder 44 includes a tube clamp (blood collection stopping means) 46 driven by a tube clamp solenoid 45, and the tube clamp 46 closes the blood collection tube 2 by clamping and stops the blood collection operation in the blood bag 1. Reference numeral 47 is a clamp release button for the tube clamp lamp 46, and 48 is a clamp button for activating the tube clamp 46 in an emergency.

The display panel 12 of the blood sampling device 10 includes a blood sampling amount / vacuum degree switching indicator lamp 49, a blood sampling volume / vacuum degree switching switch 50, 400 ml / 20.
0 ml changeover indicator lamp 51, 400 ml / 200 ml changeover switch 52, stop switch 53, start switch 54, used bag indication lamp
55, bag change switch 56, blood collection / vacuum display
With 57. The blood collection device 10 includes a power switch 58 and a fuse holder 59 in the lower front portion of the housing 11, and a power connector 60 in the lower rear portion of the housing 11.

Next, the control device 18 of the blood collection device 10 will be described. As shown in FIG. 6, the control device 18 mainly includes the main control circuit 6
1, a drive circuit 62, and a display circuit 63. Incidentally, 6
4 is a power supply unit.

The main control circuit 61 includes a CPU (central processing unit) [including a memory in which a control program for a series of operations of the device 10 is written] 65, a memory (storage means) 66, an input / output control unit 6
7, LED (light emitting diode) drive circuit 68, buzzer 69,
It has a fail-safe circuit 70. The input / output control unit 67 includes the above-mentioned optical sensor for detecting the swing position of the bag tray 19.
40, each detection signal of the blood leak sensor 71 for detecting blood leak from the blood bag 1 is transferred.

The memory 66 is composed of a non-volatile memory such as EA-ROM and EEP-ROM, and can rewrite and read the stored data, and can hold the stored data without applying the power supply voltage. The stored data of the memory 66 includes the negative pressure generated in the vacuum blood collection chamber 13, the set blood collection amount in the blood bag 1, the swing extension time of the bag tray 19 after the blood collection is completed, and the like.

The buzzer 69 completes blood collection, error of negative pressure formed in the vacuum blood collection chamber 13, rotation error of the swing motor 23,
Depending on the blood leak detection of the blood leak sensor 71, etc., they ring in different ringing modes.

The fail-safe circuit 70 monitors the occurrence of runaway of the CPU 65 and stops the device on the safe side when the runaway occurs.

The drive circuit 62 is connected to the main control circuit 61, and the A / D
A conversion circuit 72 is provided. The A / D conversion circuit 72 is connected to the weight sensor amplification unit 38 in which the strain gauge 34 is connected, and the pressure sensor 73 that is provided in the vacuum pipe 41 and detects the negative pressure of the vacuum blood collection chamber 13 has a pressure. Sensor amplifier circuit 74
Connected via

At this time, the CPU 65 of the control device 18 outputs the output y of the strain gauge 34.
Calculates the blood sampling weight as a linear function of y = aw + b with respect to the measured blood sampling weight w. Also, the CPU65
The pressure is calculated assuming that the output z of the pressure sensor 73 constitutes a linear function of z = cp + d with respect to the measured pressure p.

The drive circuit 62 is a tube clamp solenoid.
A solenoid drive circuit 75 for controlling 45, a solenoid drive circuit 76 for controlling the exhaust solenoid 42, a pump drive circuit 78 for turning on / off the power supply switch 77 of the vacuum pump 17, and a power supply switch 79 for the swing motor 23 on / off. A motor drive circuit 80 is provided.

Incidentally, the CPU 65 of the control device 18 obtains the detected pressure of the pressure sensor 73 and the set pressure of the vacuum blood collection chamber 13 which is the stored data of the memory 66, so that the detected pressure matches the set pressure, and the vacuum is set. The power supply switch 77 of the pump 17 is on / off controlled as described above. As a result, the negative pressure in the vacuum blood collection chamber 13 slightly changes within a fixed range of the set pressure, resulting in a constant pressure state.

Next, a procedure for collecting blood by the blood collecting apparatus 10 will be described.

Turn on the power switch 58.

Select the blood sampling volume with the 400ml / 200ml selector switch 52. The selection result is displayed on the switching display lamp 51.

The bag to be used is selected by using the bag changeover switch 56. The selection result is displayed on the display lamp 55. The types of bags to be used include single (S) having only a parent bag, double (D) having at least one small bag, triple (T), and quadruple (Q).

The blood collecting needle provided at the end of the blood collecting tube 2 is punctured in the donor to collect blood to some extent.

The blood bag 1 is placed in the vacuum blood collection chamber 13 and placed on the bag pan 19, and the blood collection tube 2 is set in the tube holder 44.

At this time, the container holder 102 provided on the bag tray 19 is lifted, and the central holding portion 102A of the container holder 102 is moved to the spring 1
The blood bag 1 is placed inside the bag tray 19 and the slit 6 of the blood bag 1 is placed in the container tray of the bag tray 19 in a state of being set to the standby position where it abuts against the inner surface of the lid 14 in the open position by the pulling force of 04. Enter the stopper 101.

Next, lower the container holder 102, and press the center holder 102A.
After the blood bag 1 is held around the tube connecting portion 1B, the blood collecting tube 2 is fitted into the tube holder 44 and clamped. After the setting of the blood bag 1 is completed, the lid 14 is closed.

The start switch 54 is turned on. Controller 18 is a vacuum pump
17. The swing motor 23 is drive-controlled to collect blood by decompressing the vacuum blood collection chamber 13 and swing the bag tray 19. Further, the control device 18 obtains the output of the weight sensor amplification unit 38 at the timing as described above when the bag tray 19 is at the turning point of either the highest point or the lowest point in the swinging process, and the blood bag is obtained. In addition to detecting the measured blood collection amount of 1, the remaining blood collection amount (volume) is calculated by the following equation (1) using the set blood collection amount written in the memory 66, the blood specific gravity, and the preregistered weight of the blood bag 1. Calculate

Residual blood collection amount (ml) = [set blood collection amount (g) + pre-registered weight (g) -measured blood collection amount (g)] / specific gravity (g / ml) (1) The control device 18 is the above calculation result. On condition that the residual blood collection amount has reached zero, the blood collection tube 2 is closed by the tube clamp 46 and the blood collection operation for the blood bag 1 is stopped. At this time, the control device 18 stops the vacuum pump 17 and opens the exhaust valve 43 to open the vacuum blood collection chamber 13 to the atmosphere.

After the blood collection is completed, the control device 18 extends and drives the swing motor 23 for a certain period of time to swing the bag tray 19. After that, the buzzer notifies the end of blood collection.

Turn on the clamp release button 47, remove the blood collection tube 2 from the tube holder 44, and remove the blood bag 1 from the vacuum blood collection chamber 13
Take out from.

In the blood collection device 10, the upper surface opening 11 of the housing 11 for taking the blood bag 1 in and out of the bag tray 19
A is set to have a downward slope from the back side of the housing 11 toward the front side.

 Next, the operation of the above embodiment will be described.

(1) The blood bag 1 set in the bag pan 19 has the slit 6 formed in the blood bag 1 on the side opposite to the tube connecting portion 1B locked to the container locking device 101 of the bag pan 19, The saucer 19 is held at an appropriate predetermined position.

Therefore, when the blood bag 1 is set in the bag tray 19, the bag 1 is set in a proper predetermined position without being set to one side or set obliquely,
Around the tube connection portion 1B of the blood bag 1 is a bag tray 19
The tube connecting portion 1B does not bend at the boundary with the bag main body portion 1A because the tube connecting portion 1B does not come into contact with the frame-shaped side edge portion and is lifted.

Further, when the bag tray 19 is swung during blood collection and has a downward slope, the blood bag 1 does not slide down and lean toward one end of the bag tray 19 or obliquely incline, so that no bending occurs.

As a result, the blood flowing from the blood collection tube 2 into the bag 1 reaches the entire area of the bag from the initial stage of blood collection,
As a result of being sufficiently stirred with all the anticoagulants in the bag 1, the occurrence of blood coagulation can be reliably prevented.

(2) The blood bag 1 set in the bag tray 19 is held around the tube connecting portion 1B by the container holder 102 rotatably provided in the bag tray 19 and the blood bag 1 is bent. Is prevented.

Therefore, the blood collection tube 2 is connected to the blood bag 1 at the connection portion 1B.
When the blood collection tube 2 is extended upward from the blood collection side to the blood collection person side, the blood collection tube 2 that is extended upward is a tube connection part of the blood bag 1.
The tendency to pull up 1B is suppressed by the presence of the container holder 102, and as a result, the blood collection tube connecting portion 1B
Does not bend at the boundary with the bag body 1A.

It should be noted that this action of the container holder 102 is such that the swing fulcrum of the bag tray 19 is set in the middle portion of the bag tray 19 and the swing amplitude around the tube connecting portion 1B located at one end side of the bag tray 19 is set. When the blood introduced from the blood collection tube 2 into the bag 1 is shaken greatly at the same time as the introduction, it is possible to ensure the agitation of the blood and the anticoagulant from the beginning of the blood introduction. The tendency that the blood collection tube connecting portion 1B which largely shakes inward is attracted to the blood collection tube 2 extending upward is reliably suppressed, and the above-mentioned bending is reliably prevented.

In addition, when the blood collection tube 2 extending upward from the blood bag 1 toward the blood collector is twisted around its own axis in the extension process and is clamped by the tube holder 44, The presence of the container holder 102 suppresses the tendency of the repulsive force of the twist generated to lift up around the tube connecting portion 1B of the blood bag 1, and as a result, the tube connecting portion 1B is bent at the boundary with the bag body portion 1A. Never.

Further, the blood bag 1 is provided with one or more other child bags connected to the connecting tube 3 for separating the components of the collected blood, and a bag tray with the child containers stacked on the lower surface side of the blood bag 1. When set to 19, as a result of the tube connection parts of the plurality of bags overlapping each other, the tube connection part 1B of the upper blood bag 1 is raised due to the presence of the tube connection part of the lower child container. Even if there is a large step above the bag body 1A of the blood bag 1, the presence of the container holder 102 keeps the blood bag 1 around the tube connecting portion 1B substantially horizontal, resulting in As tube connection part 1B is bag body part 1A
Bending does not occur at the boundary between and.

As a result of the inventor's experiment, the blood coagulation occurrence rate was 7.3% (N = 80) when blood was collected from the comparative device in which the container locking member 101 and the container holder 102 were removed from the blood collecting device 10. On the other hand, the blood coagulation occurrence rate when blood was collected by the blood collecting apparatus 10 was 0.0% (N = 200), confirming the remarkable usefulness of the present invention.

It should be noted that in the practice of the present invention, the container locking member provided on the container supporting portion may be one such as a column 201 protruding from the bottom surface of the bag tray 19 as shown in FIG.

Further, the blood sampling device of the present invention, the measurement method of the blood sampling amount measuring means, does not necessarily determine the blood sampling amount by measuring the weight change of the blood container, by measuring the volume change of the blood container, the blood sampling amount May be required.

[Effects of the Invention] As described above, according to the present invention, it is possible to prevent bending of a blood container that is set on a container support part and is used for blood collection, and to sufficiently introduce blood introduced into a blood container into an anticoagulant in the container. It can be stirred to prevent the occurrence of blood coagulation.

[Brief description of drawings]

FIG. 1 is a front view showing a blood collecting device according to one embodiment of the present invention, FIG. 2 is a side view showing a main portion of FIG.
Fig. 1 is a plan view of Fig. 1, Fig. 4 is a side view showing a scale, Fig. 5 is a vacuum circuit diagram, Fig. 6 is a swinging state diagram, Fig. 7 is a control block diagram, and Fig. 8 is blood sampling. FIG. 9 is a perspective view showing the apparatus, FIGS. 9 (A) and 9 (B) are schematic views showing a set state of the blood bag, FIG. 10 is a sectional view taken along line XX of FIG. 3, and FIG. 11 is a blood bag. FIG. 12 is a cross-sectional view showing a modified example of the container locking device, and FIG. 13 is a schematic view showing a bent state of the blood bag in the conventional device. 1 ... Blood bag, 1A ... Bag body, 1B ... Tube connection, 2 ... Blood collection tube, 6 ... Suspension slit, 10 ... Blood collection device, 19 ... Bag pan (container support) , 22 ... rocking frame (rocking table), 23 ... rocking motor, 33 ... scale (blood sampling amount measuring means), 101 ... container locking device, 102 ... container holding device.

Claims (1)

(57) [Claims] 1. A container supporting part for supporting a blood container containing a soft plastic anticoagulant, to which a plastic blood collecting tube is connected, and a rocking means for rocking the container supporting part during blood collection into the blood container, A blood sampling device comprising a blood sampling amount measuring means for measuring a blood sampling amount in a blood container, wherein the blood container is locked to a locked portion formed in the blood container on the side opposite to the blood sampling tube connecting portion. A container locking member for holding the container at a predetermined position in the container supporting unit is disposed on the container supporting unit, and the blood container supported by the container locking unit in the container supporting unit is held from above and A blood collecting device, wherein a container holder that is rotatably provided on the container supporting portion is provided to prevent bending of the blood container.